Curator’s Corner

Museum, research, and collection updates from Dr. José H. Leal, plus Shell of the Week, which highlights a different species every other Friday. Most Shells of the Week are found in Southwest Florida.

Dr. José H. Leal serves as the Bailey-Matthews National Shell Museum & Aquarium’s Science Director and Curator. He received his Ph.D. in Marine Biology and Fisheries from the University of Miami and has served at the Museum since 1996.

Shell of the Week: The Smooth Sundial

Reaching only about 14 mm (about 0.6 mm) in diameter, Psilaxis krebsii (Mörch, 1875), is one of the smallest species in the sundial family Architectonicidae. The Smooth Sundial has an amphi-Atlantic distribution, living in moderately deep water from Florida to Colombia in the western Atlantic, and the Mediterranean Sea, Canary Islands, and off West Africa. (A large reproduction of this illustration is displayed in the In Focus exhibition at the National Shell Museum.) #psilaxiskrebsii #smoothsun

Extinction is Forever!

The Arc-form Pearly Mussel, Epioblasma arcaeformis (Lea, 1831), a freshwater bivalve originally from Alabama, Kentucky, and Tennessee, is one of the mollusks diagnosed as extinct in the Red List prepared by the International Union for Conservation of Nature (IUCN). The Red List classifies animals according to their conservation status, ranging from species of “Least Concern” to “Extinct in the Wild.” In this case, extinction was caused by habitat loss due to construction of dams and human encroa

The Amazing Cuttlefish Eye

The wavy, or w-shaped cuttlefish eye has been recently in the news, as scientists keep researching the unique features and properties of cephalopod eyes. Cuttlefish eyes can perform functions that are similar to those in vertebrates, such as the refined three-dimensional vision that allows them to accurately estimate distance and speed of fast-moving prey. Three-dimensional, or stereoscopic vision in cuttlefish is greatly aided by their ability to swivel their eyes back-and-forth, a talent unkno

Shell of the Week: The Channeled Sundial

Heliacus infundibiliformis (Gmelin, 1791) reaches 15 mm (about 0.6 inch). It has a “flattened” shell and a wide umbilicus (opening on shell base) and may reach about 15 mm (about 0.6 inch). The entire shell sculpture consists of beaded spiral cords. Sundials are usually associated with soft corals, and the Channeled Sundial is no exception. The species is found from the coast of Southeast Florida to the southern Caribbean. (A large reproduction of this illustration is displayed in the In Focus e

Shell of the Week: The White-spot Marginella

Prunum guttatum (Dillwyn, 1817) reaches 26 mm (about one inch). It has a smooth, glossy shell, with a typical color pattern of irregular white spots set against a background of three faint, tan-colored spiral bands. The species is found from the coast of Southeast Florida to the lower Caribbean. (A large reproduction of this illustration is displayed in the In Focus exhibition at the National Shell Museum.)

The Magnificent Milk Conch

Two of the best-known species of true conchs (family Strombidae) in the western Atlantic, Milk Conchs (Macrostrombus costatus) and Queen Conchs (Aliger gigas) are quite distinctive as mature snails. When reaching maturity, both species start thickening and flaring the shells’ outer lip. However, without the flared lips typical of each species. young Milk Conchs can be easily confused with young Queen Conchs. Nonetheless, if you observe the living animals, you’ll see that they differ, among other

Shell of the Week: The Carmine Marginella

Eratoidea hematita (Kiener, 1834) has a striking glossy, carmine-red, or pink color that is very bright in the living animal. After the snail dies, the remarkably strong color hues slowly fade away. The outer lip in this species bears about 15 denticles, and the columella (on the other side) has about four strong folds. The species is found in South Florida, the Florida Keys, and the Caribbean. (A large reproduction of this illustration is displayed in the In Focus exhibition at the National She

Meet the Giant Triton

The Giant Triton, Monoplex parthenopeus (Salis Marschlins, 1793), is a relatively common western Atlantic species that is present also in parts of the Indian and Pacific oceans. The long-lasting pelagic (open-water) larvae in this species allows for crossing of wide ocean expanses at the larval stage. This is one of the reasons for the broad geographical distribution of this species. National Shell Museum collaborator Anne DuPont photographed this Giant Triton off Pompano Beach, in Florida. Her

Shell of the Week: The Orange Marginella

Prunum carneum (Storer, 1837) reaches 18 mm (about 0.7 inches), and has a glossy, bright-orange shell surface, with two white bands. The pigments in the living snail are very vivid, but tend to fade quickly after the animal dies. The Orange Marginella is found in shallow water off South Florida, the Florida Keys, and the Caribbean. (A large reproduction of this illustration will be in the In Focus exhibition, opening on May 29.) #prunumcarneum #orangemarginella #marginellidae #stockisland #infoc

Squids in Space

Now our Giant Pacific Octopus is jealous! On June 3, NASA’s Kennedy Space Center will launch SpaceX’s 22nd resupply mission to the International Space Station. In the payload of the Falcon 9 rocket are several immature Glow-in the-Dark Bobtail Squid, Euprymna scolopes. The young squids are part of a research project titled UMAMI, short for Understanding of Microgravity on Animal-Microbe Interactions. The project examines the effects of spaceflight on interactions between beneficial microbes and